What is the knowledge of personal protection?
4) NRR value alone may not be able to assist the user to select the most appropriate ear protection device, should also consider the ear protection device in different audio frequency reduction ability.
5) If the laborers are required to enter and leave the hearing area frequently, the earbuds with the rope can be selected to facilitate the wearer to wear or remove.
6) In general, the erection of the erection of the ability to reduce noise than the earplugs. However, due to wearing glasses will make some earmuffs can not close and have gaps, affecting the effect. In addition, if the earmuffs are too tight, will make the wearer feel uncomfortable and do not want to use. Therefore, sometimes earplugs are also a good choice.
7) In the case where the earmuffs must be worn to be effective, since the earmuffs may interfere with other personal protective equipment such as helmets, an integrated helmet cap can be selected.
8) In the dust working environment, should choose a one-time earplugs or replaceable cushions of the earmuffs.
3 What are the ear protectors?
Noise Operating Environment When working with noise protection facilities, the workplace noise can not meet the standard requirements, the workers should wear appropriate personal protective equipment, such as earplugs, earmuffs, anti-sound cotton, etc., or may lead to noise deafness. Cotton insulation volume of 5 ~ 10dB, cylindrical earplugs of the sound insulation of 20 ~ 30 dB, if the workplace noise volume is not a large amount of the case, you can sample these ear protection device. Several common ear protection sound insulation as follows:
4 What should I pay attention to?
1) Before selection, should be commissioned by the detection of qualified occupational disease prevention and control institutions to carry out workplace noise assessment to determine the noise level and noise frequency characteristics.
2) understand the noise reduction of supplies, select the appropriate ear protection device. NRR is an indicator of the ability to reduce noise, assuming a noise in a workplace
Flat for 100 dB, and an earphone with an NRR of 20, it means that the wearer's noise exposure level is estimated to be reduced to 80 dB after the earbuds are properly worn.
3) You should not blindly choose the loudspeaker with the greatest noise reduction capability. Excessive noise reduction capability may have a negative effect, such as preventing the wearer from listening to the warning signal or talking to other people to increase the unnecessary cost
